City Guilds Model Questions Vol1 2017 Engineering Question 45

Practice objective / multiple choice question 45 from the 2017 City Guilds Model Questions Vol1 Engineering examination.

City Guilds Model Questions Vol1 2017 Engineering Objective / Multiple Choice Medium Difficulty
Question 45 CITY_GUILDS_MODEL_QUESTIONS_VOL1 • 2017 • ENGINEERING • objective

An AC supply of 230 V rms at 50 Hz feeds a series circuit containing a resistor \(R = 100\,\Omega\) and an unknown inductor \(L\). The circuit draws 2 A rms and has a lagging power factor of 0.6. (a) Determine the inductive reactance \(X_{L}\) and the inductance \(L\). (b) To correct the power factor to unity, a capacitor \(C\) is connected in parallel with the series combination. Find the required capacitance \(C\).

Answer Options

A. X_{L}≈70\\,\\Omega, L≈0.223\\,H; required C≈12\\,\\mu F
B. X_{L}≈110\\,\\Omega, L≈0.350\\,H; required C≈30\\,\\mu F
C. X_{L}≈80\\,\\Omega, L≈0.255\\,H; required C≈18\\,\\mu F
Correct Answer D. X_{L}≈92\,\Omega, L≈0.293\,H; required C≈22\,\mu F
Correct Answer
D
Correct Option:
X_{L}≈92\,\Omega, L≈0.293\,H; required C≈22\,\mu F

About This Question

This is City Guilds Model Questions Vol1 2017 Engineering Question 45. It is one of the objective questions from the 2017 City Guilds Model Questions Vol1 Engineering examination.

Difficulty level: Medium .

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